All the rubber is hard under there (18 years...), I'd start by replacing it ALL then checking the fuel setting at idle too. I did this and it REALLY helped my 300SEL. Also, I replace all the sending units back to the motor. The four pin CIS, the two pin fan, and the single pin temp gauge. They're wear items.

I think I spent an entire $100 on resealing my motor and a good weekend. Valve stem seals too! I have new injectors to install also, 250k and I say it's time.

Still need to test the idle valve and the cold start injector too. I'd hate to just throw money at it if I don't need to replace. But again, 250k and I just may need to.

Don't forget a good O2 for it too.



Aren't the late 103s fuel relays built into the MAS sender? I think mine has that issue.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]